package com.nowcoder.community.aspect;


import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 用户访问日志
 */
//@Component
//@Aspect
public class ServiceLogAspect {

    private static final Logger logger = LoggerFactory.getLogger(ServiceLogAspect.class);

    @Pointcut("execution(* com.nowcoder.community.service.*.*(..))")
    public void pointcut(){}


    @Before("pointcut()")
    public void before(JoinPoint joinPoint){
        //用户+在time访问了+funcation()
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if(attributes==null){
            return;//系统消息不经过Controller,此时的attributes为null
        }
        HttpServletRequest request = attributes.getRequest();
        String ip = request.getRemoteHost();
        String now = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
        //目标类名+方法名
        String target = joinPoint.getSignature().getDeclaringTypeName()+"."+joinPoint.getSignature().getName();
        logger.info(String.format("用户{%s},在{%s}访问了{%s}。",ip,now,target));
    }

}
